CUET-PG SERIES Material-science-and-technology
Energy Bands
4 previous year questions.
Volume: 4 Ques
Yield: Medium
High-Yield Trend
4
2024 Chapter Questions 4 MCQs
01
PYQ 2024
medium
material-science-and-technology ID: cuet-pg-
The energy gap between the top of the valence band and bottom of the conduction band is called the energy band gap . Depending upon the materials, the gap can be:
1
Positive
2
Negative
3
Zero
4
Positive,Negative,Zero
02
PYQ 2024
medium
material-science-and-technology ID: cuet-pg-
The ratio of charge carrier densities in a pure silicon crystal at and is 1.25. The energy gap of the semiconductor is:
1
2
3
4
03
PYQ 2024
medium
material-science-and-technology ID: cuet-pg-
A semiconductor has acceptor levels above the valence band. The maximum wavelength of light which can excite an electron is:
1
2
3
4
04
PYQ 2024
medium
material-science-and-technology ID: cuet-pg-
The energy of a photon of sodium light ( ) is equal to the band gap of a semiconducting material. The minimum energy required to create a hole-electron pair is:
1
2
3
4